muxdy



(No Model.)

' J. G. MUNDY.

DUST COLLECTOR.

No. 398,788. Patented Feb. 26, 1889.

here 2".

' nvwy;

N PETER$ Plmm-Lilhognphm. WashmglcmLLC,

FFliCE= JOHN G. MUNDY, OF JACKSON, MICHIGAN, ASSIGNOR TO THE KNTCKER-ROCKER COMPANY, OF SAME PLACE.

DU$T-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 398,788, datedFebruary26, 1889.

Application filed December 1, 1888. Serial No. 292,364. (No model!) inthe county oi" Jack on and State of Michr gan, hare invented a new anduseful linproveinent in Dust-(ioilectors, oi which the following is af-SPQClflCltiOil.

This invention relates tothat class of dustcollectors which are providedwith a separating-case in which the dust-laden air is caused to assume awhirling motion, whereby the dust or solid n'iattcr is thrownot'lfl'iycentrifugal iorce, while the air freed from dust moves towardthe axis of the separatin g-case and 0s capes at or near the thereof. Ina dustcollector of this lcindi'er instance, that now I wellknown as thecyclonedust-collector the purified air escapes from theseparatingchamber with a whirling niotion. created in thescparating-cl'minber and its air outlet tube causes a raretaction of theair near the axis of the separating-chaniber, which l rarcfactioninduces central ingoing currents,

both in the air-outlet tube and in the dustoutlet. The purified airescapes in a whirlingannular layer, hugging the air-outlcttube, whilethe inner portion of the area of the airoutlet tube is occupied by theingoin g induced current of air. The effective discharge area of theair-outlet tube is therefore only a small part of its total area. placein the dust-discharge at the small end of the tap ringseparating-chamber, through which a light air-current issues in anannular layer with a whirling 11]Oli(iil,'\\l1l(:ll air-current hugs theperiphery of the dust-outlet, while an induced air-current entersthrough theinner portion of the dust-outlet, unless the lati ter isclosed by a trap or other discharge device. This induced currententering through the dust-outlet is liable to carry dust particles backinto the scparatin g-cha 1llhGl,WllOl'O they 111a I reach the out oii'iair-current and thus i b h 7 be discharged with the purilicd air.

The object of my invention is to overcome these difficulties and lattain this obcct b i i breaking up the whirling motion ol'the airin thecenter of the separatingchaniber.

In the accompanying drawings, Figure 1 is a sectional elevation. showingthe preferred construction of my improvement. Fig. 2 isa WENDY, acitizen of the United States, residing at Jackson, 1

The vortex A similar action takes horizontal section in line a: .1, Fig..1. Fig. 3 is a perspective view of the air-escape device. Figs. i andv5 are horizontal sections showing slightly-inodiiied constructions ofthe air-(lischarge device. Fig. (5 is a vertical section of adustcollector, showing a modilied construction of my iinproYeinent. Fig.Tis a horizontal section in line 3/ 1 Fig. (5.

Like letters of reference refer to like parts in the several figures.

A represents the peripheral wall or". the separating-cliamber, havingits body portion made tapering downwardlr toward the dust-dischargeopening (1/ and its upper portion made cylindrical.

A represents the tangential inlet-spout for the dust-laden air enteringthe upper cylindrical portion of the peripheral wall.

. B represents the head applied to the top of the separating-chalnberand p rorided with a central opening, t), for the escape of thepurificdair.

C represents a wind-break arranged in the central portion of theseparating-chamber, so as to break the whirling motion of the air andcompel the air to assume a rectilinear motion toward the air-outletopening 7). This windbreak is made tapering toward the small end of thesepa-rating-chaniber, so as to leave sufficient space between thewind-break and the peripheral wall, in which the air can whirl and thedesiredseparation ol' the solid particles from the air can be effected.

D represents a square or angular outletl tube arranged in the air-escapeopening I),

and depending into the separating-chamber. The wind-break C consists, asrepresented in Figs. 1 and 2, of two intersecting plates arrangedradially and at right angles to each other in the separating-chaniber.Theseplates extend with their upper portions into the square air-outlettube, and are secured to the latter, while their lower tapering portionsextend into the scparating-chaniber. As representcd in Figs. 1 and 2,the plates of the windbrcak are arranged. diagonally in the squareainoutlet tube, while in the constructions represented in Figs. i and 5the plates are arranged parallel with the sides of the airoutlet tube.In the construction represented in Figs. 6 and 7 the upper portions ofthe i i i l plates or strips of the wind-break are arranged on the outerside of a round air-outlet tube,

'D, and the lower tapering portions do not 'rent approaches the centralportion of the separating-chamber, it strikes against the radial platesor strips of the wind-break, which stand across the patlror direction inwhich the air whirls, and whereby its whirling motion is broken, and itis turned upwardly and caused to flow in a rectilinear course throughthe air-discharge tube. By thus destroying the vortex in the centralportion of the separating-chamber the suction effect of the v0rtex isalso wholly or nearly destroyed and the induction of air into theseparating-chamber through the air-outlet opening is avoided. The entirearea of the air-outlet tube is thereby rendered available for the exitof the air, so that the area of this tube can be considerably rcducedwithout interfering with the free escape of the air.

The flat sides of the air-outlet tube break the whirling motion of theoutgoing current of purified air and change, to a large extent, themotion of this current from a whirling to a rectilinear motion in theabsence of the wind-break, thereby reducing the suction effeet of thewhirling body of air in the separating-chamber, while when thewind-break is used the anti-vertical effect of the flat-sided tube iscumulative with that of the windbreak.

The fiat sides of the air-outlet tube also serve to deflect the dustparticles which come in contact with the same outwardly and toward theperipheral. wall of the separatingchamber, and this action takes placeto the greatest extent when the side of the air-outlet tube is arrangedobliquely to the direction in which the dust-laden air enters theseparating-chamber, as represented in Fig. 2.

The dust-discharge opening a is preferably provided with a weighted orother automatic trap, E, whereby the separated dust is dischargedwithout permitting any considerable portion of the air to escape withthe dust. Such. a trap is desirable in a dust-collector containing awind-break, because the latter has a tendency to cause an increasedescape of air with the dust when the dust-outlet is unprotected.

I claim as my invention 1. The combination, with the separatingchamberprovided with means whereby the dust-laden air is caused to assume awhirling motion in the same, and having an outlet for the purified airand a dust-discharge, of a wind-break arranged across the path of thewhirling air-current in-.the axial portion of the separating-chambcr,whereby the whirling motion of the air is broken in the axial portion ofthe separating-ehamber and the air is caused to move in a straightcourse toward and through the air-outlet, substantially as set forth.

2. The combination, with the separatingchamber provided with meanswhereby the dust-laden air-current is caused to assume a whirling motionin the same, and having an outlet for the purified air and adust-discharge,

of a radial wind-break arranged in the axial 7 portion of theseparating-chamber, substantially as set forth.

3. The combination, with the tapering separating-chamber provided withmeans whereby the dust-laden air is caused to assume a whirling motionin the same, and having an outlet for the purified air and adust-discharge, of a tapering wind break arranged across the path of thewhirling air-current in the axial portion of the separating-chainher,substantially as set forth.

4. The combination, with the separatingchamber provided with meanswhereby the dust-laden air is caused to assume a whirling motion in thesame, and having an outlet for the purified air and a dust-discharge, ofa tube arranged in the air-outlet, and a windbreak arranged in saidtube, substantially as set forth.

5. The combination, with the separatingchamber provided with meanswhereby the dust-laden air is caused to assume a whirling motion in thesame, and having an outlet for the purified air and a dust-discharge, ofa tube arranged in the air-outlet, and a windbreak extending from saidtube into the separating-chamber, substantially as set forth.

6. The combination, with the separatingchamber provided with meanswhereby the dustladen air is caused to assume a whirling motion in thesame, and having an outlet for the purified air and a dust-discharge, ofa fiat-sided tube arranged in the air-outlet, and awind-break arrangedin the axial portion of the separatirig-chamber, substantially as setforth.

7. The combination, with the separatingchamber provided with meanswhereby the dust-laden air is caused to assume a whirling motion in thesame, and having an outlet for the purified air and a dust-discharge, ofa flat-sided tube arranged in the air-outlet, and intersecting taperingwind-break plates having their large ends secured in said tube and havintheir tapering portions projecting from said tube into theseparating-ehamber, substantially as set forth.

Vitness my hand this 29th day of November, 1888.

JOHN G. MUNDY. 'itnesses:

R. H. EMERSON, SAM II. CAMP.

